Add "Contains" to a condition within Data Variables

In order to fully restrict my forms to show only the companies that are relevant to the logged in user, I require "Contain" to be an option when entering a condition for a Data Variable within Table Data.

I can currently create a condition where "Requestors" = Current Logged in User Email, but I would like this to be where "Requestors" Contains Current Logged in User Email. This means if more than one email address is entered in the Requestors column, it will still only show the companies that user is against. At the moment it only works if there is a single requestor (Equals).